PRINT-DOC-START-COLUMN

This state global variable controls the column in which the
``one-liner'' of a formatted documentation string is printed.
Generally, when :doc is used to print a documentation string, the
name of the documented concept is printed and then :doc tabs over to
print-doc-start-column and prints the one-liner. If the name
extends past the desired column, :doc outputs a carriage return and
then tabs over to the column. If print-doc-start-column is nil,
:doc just starts the one-liner two spaces from the end of the name,
on the same line. The initial value of print-doc-start-column is
15.